Human Biology (MLTS2101)

Biological Science - BS

Semester: First Semester

Level: 200

Year: 2016

Answers (200 )
REPUBLIC OF CAMEROON REPUBLIQUE DU CAMEROUN
Peace-Work-Fatherland Paix-Travail-Patrie
The university of Bamenda Université de Bamenda
Department of Biological Sciences Départment des Sciences Biologiques
Title: Continuous Assessment Code: MLTS2201 1
st
semester level 1 course
Date: February 2016 Time: 2:30hours
Lecturers: Mr. KADA/ Mr. OUMAR
Instructions
➢ Answer all questions section by section beginning with any part of your choice.
➢ You are reminded of the orderly presentation of your work.
SECTION A
1. Lipid bilayer is:
(a) hydrophilic (b) hydrophobic (c) hydrophilic and hydrophobic (d) depends of the
surrounding medium (e) None of the above
2. In cell membrane, carbohydrates in glycoproteins or glycolipids are oriented:
a) towards outside, b) towards inside, c) towards outside and inside, d) randomly distributed.
3. Which of the following transport induces conformational change in protein:
(a) simple diffusion (b) Active transport (c) facilitated diffusion (d) ion drive and active
transport (e) a and b
4. The major functions of the plasma membrane do NOT include:
(a) Separation of the fluid environments inside and outside the cell (b) Regulation of
molecules and ions that pass into and out of the cell (c) Recognition and communication
between different cells and tissues. (d) Recognition and communication between different
cells and tissues (e) production of proteins used in construction of the cell wall.
5. Which phrase does NOT describe one of the functions of proteins of the plasma
membrane?
(a) forming a channel through the membrane. (b) Initiating the replication of the genetic
material (c) Binding to a substance to carry it through the membrane. (d) Acting as a receptor
for substances external to the (e) Increasing the rate of a chemical reaction.
6. Epithelial tissue is characterized by each of these traits, except that ____:
(a) it lacks blood vessels (b) it functions in secretion, absorption, and excretion (c) Epithelial
cells are loosely packed and have much intercellular material. (d) it is anchored to a basement
membrane. (e) None of the above.
7. Microvilli, which function to increase surface area, are more likely to be found in ____
(a) simple cuboidal (b) simple squamous (c) transitional (d) stratified columnar epithelium
(e) none of the above.
8. Epithelium that appears layered due to the varying levels at which nuclei are found in cells
but in reality is not layered, is _________
(a) Transitional epithelium (b) pseudostratified columnar epithelium (c) stratified squamous
epithelium (d) stratified columnar epithelium (e) c and d
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9. The outer layer of the skin is composed of ___________
(a) Transitional epithelium (b) pseudostratified columnar epithelium (c) stratified
squamous epithelium (d) stratified columnar epithelium (e) none of the above
10. What type of epithelium lies in the urinary bladder and is capable of distention?
(a) stratified cuboidal epithelium (b) stratified squamous epithelium (c) transitional
epithelium (d) stratified columnar epithelium (e) simple squamous epithelium
11. An exocrine gland that loses small parts of its cell bodies during secretion, as is the case
for the mammary gland, is further classified as a(n) ______________
(a) mecrocrine (b) apocrine (c) holocrine (d) endocrine (e) c and d
12. Which of the following is not a characteristic of tight junctions?
(a) encircle epithelial cells near their apical surface (b) attach each cell to its neighbors by
fusing plasma membranes (c) allow free flow of cytoplasm between neighboring
(d) prevent substances from passing in between adjacent cells (e) none of the above
13. Which of the following pairings is incorrect?
(a) hyaline cartilage, articular ends of long bones (b) supporting conncective tissue, blood
(c) fibrocartilage, intervertebral discs and menisci (d) elastic cartilage, epiglottis and
external ear (e) all of the above
14. The protective dead layer of cells of the outer epidermis is called the _________
(a) stratum corneum (b) stratum granulosum (c) stratum spinosum (d) stratum basale
(e) none of the above
15. melanocytes lie within the ___ of the skin.
(a) stratum corneum and top layers (b) deepest dermis (c) stratum spinosum and stratum
lucidum (d) stratum basale and upper dermis (e) c and d
16. Which of the following is the most complex level of organization?
(a) organ system (b) macromolecule (c) organ (d) organelle (e) all of the above.
17. Skin or bone is an example of what level of organization?
(a) tissue (b) Cell (c) macromolecule (d) organ (e) none of the above.
18. The _____ cavity is the portion enclosed by the hip bones.
(a) abdominopelvic (b) pelvic (c) abdominal (d) thoracic (e) inguinal cavity
19. the lower arm is _____ to the stomach area, while the head is ____ to the stomach.
(a) medial; peripheral (b) proximal; anterior (c) lateral; superior (d) inferior; superficial
(e) all of the above.
20. A ____ section divides the body into right and left portions.
(a) coronal (b) transverse (c) sagittal (d) oblique (e) none of the above.
21. The human liver is primarily located in the ____
(a) right upper quadrant of the abdominal area (b) left lower quadrant of the abdominal area
(c) right iliac region (d) left hypochondriac region (e) all of the above.
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22. Anatomy is a term which means the study of ___
(a) physiology (b) morphology (c) cell functions (d) human functions (e) human
dysfunctions
23. What is another name for a frontal section?
(a) transverse (b) coronal (c) sagittal (d) occipital (e) parietal
24. Homeostatic mechanisms:
(a) keep variables exactly at the set point (b) help to keep a relatively constant internal
environment in the body (c) act to keep values out of the normal range. (d) usually operate by
positive feedback (e) produce most disease conditions.
25. Negative-feedback mechanisms:
(a) are homeostatic (b) are rare in healthy individuals (c) respond by making deviations from
normal ev larger (d) are counteracted by most medical therapist (e) may have a receptor, a
control center, and effector
26. Which of these conditions indicate positive-feedback has occurred?
(a) blood pressure decrease greatly, blood flow to the heart is inadequate, a blood pressure
decreases (b) hot temperature, increase your body temperature above normal, sweat (c) cold
temperatures, decrease your body temperature below normal; you shiver (d) blood pressure
decreases; as a result your heart increases (e) all of the above
27. which of these statements correctly describe anatomic position?
(a) A person that is lying sup with arms at the side is in anatomic position (b) A person that
is lying prone with arms at the side is anatomic position (c) A person standing erect that is
facing forward with the arms hanging to the sides with the palms of the hands facing medially
is in anatomic position (d) A person standing erect that is facing forward with the arms
hanging to the sides with the palms of the hands facing forward is in anatomic position (e) A
person standing erect that is facing forward with the arms hanging to the sides with the palms
of the hands facing laterally is in anatomic position.
28. The body system that consists of the skin, hair, nails and sweat glands and provides
protection and regulates temperatures is the:
(a) muscular system (b) skeletal system (c) integumentary system (d) endocrine system (e)
lymphatic system
29. Movement of solutes through a membrane with the use of a transport protein is called
(a) osmosis (b) facilitated diffusion (c) carrier-mediated transport (d) active transport (e)
passive transport
30. If transport through a cell membrane require the expenditure of energy, it is called:
(a) facilitated diffusion (b) active transport (c) simple diffusion (d) passive diffusion (e) none
of these
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Section B.
1. In a normal cardiac cycle:
A. RA systole precedes LA systole
B. RV ejection precedes LV ejection in expiration
C. RV contraction precedes LV contraction in inspiration
D. Pulmonary valve closes after aortic in inspiration
E. Pulmonary valve closes before aortic in expiration.
2. In a normal cardiac cycle (same as CV01 but we remembered the option as)
A. RA ejection precedes LA ejection
B. RV contraction starts before LV contraction
C. LV ejection starts before RV ejection
D. Pulmonary valve closes before aortic valve
E. Aortic valve closes after pulmonary valve in expiration
3. With respect to the cardiac cycle:
A. Right ventricle starts ejecting before the left ventricle
B. Pulmonary valve closes before the aortic valve
C. Right and left atrial systole occur simultaneously
D. peak aortic blood flow coincides with jugular venous c wave
E. Right ventricle ejection proceeds left ventricular ejection
4. The lowerst intrinsic discharge activity resides in the
A. SA node
B. AV node
C. Bundle branches
D. Purkinje fibres
E. Ventricular fibres
5. The LAST part of the heart to depolarise is :
A. Base of the left ventricle
B. Base of the right ventricle
C. The apex of the epicardium
D. The endocardium of the right ventricle
6. Blood flow at rest is most for
A. Brain
B. liver
C. Kidney
D. Heart
E. Skeletal muscle
7. During strong(severe) exercise, oxygen consumption is greatest in:
A. Brain
B. Heart
C. Skeletal muscle
D. Liver
E. Kidney
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8. Contraction of the aorta:
A. Cardiac output is 1.5 times normal
B. Systemic vascular resistance is higher in the lower limbs as compared to the upper limbs.
C. Blood flow in all times will be normal
D. Arterial baroreceptors are inactive
E. Blood pressure the same at arm and leg
9. During a cardiac cycle, the first part of the ventricles to contract is:
A. Apex of left ventricle
B. Base of left ventricle
C. Septum
D. Epicardium at base of left ventricle
E. Right ventricle
10. The velocity of blood flow is greatest in:
A. capillaries
B. pulmonary vein during diastole
C. Small arteries
D. Inferior vena cava
11. Which ONE of the following is true:
A. Right atrial systole and left atrial systole occur at the same time
B. Pulmonary valve closes before aortic in inspiration
C. c wave of atrial pressure trace occurs at time of peak aortic pressure
D. RV ejection precedes LV ejection
12. The central nervous system includes all the following components except:
A. spinal cord
B. medulla oblongata
C. autonomic ganglia
D. diencephalon
13) For 13- 17, match the structures listed with the number: a) frontal lobe; b) Parietal Lobe;
c) Occipital Lobe; d) Cerebellum; e) Temporal Lobe.
On the answer sheet, use the letters only.
13
15
16
14
17
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18. The central nervous system is connected with the peripheral nervous system by all the following types of
nerve fibers except:
A- postganglionic autonomic fibers
B- preganglionic autonomic fibers
C- somatic motor fibers
D- autonomic sensory fibers
19. The sensory system is involved in all the following except:
A- initiation of reflex movements
B- initiation of voluntary movements
C- learning processes
D- initiation of emotional responses
20. The structural and functional unit of nervous systems:
A- Nerve cell
B- Dendrites
C- Axon
D- Neuroglia
21. The phagocytic activity is a feature of:
A- Astrocyte
B- Oligodendrocyte
C- Microglia
D- Schwann cell
For questions 22 and 23, put the following in order of their occurrence.
22. In chemical synapse:
(a) Neurotransmitter is released
(b) Voltage gated calcium channels open in the presynaptic cell
(c) Ion channels open in the post synaptic cell
(d) An action potential travels down the axon to the axon terminal
(e) Neurotransmitter binds
23. A simple reflex arc is composed of:
(a) a receptor
(b) a sensory neuron
(c) a motor neuron
(d) an effector
(e) an integration center
(f) all of the above
24. There are pairs of cranial nerves and pairs of spinal nerves.
(a) 12, 31
(b) 13, 31
(c) 13, 32
(d) 12, 32
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5. A patient enters the emergency room experiencing symptoms of meningitis. Which cell, located in the
CNS, will assist in dealing with the disease?
(a) astrocytes
(b) ependymal cells
(c) microglia
(d) oligodendrocytes
(e) satellite cells
26. There are more chloride ions located extracellularly that intracellularly in a typical neuron
(a) True
(b) False
27. When a charge reversal occurs in a neuron, this is known as:
(a) depolarization
(b) repolarization
(c) overshoot
(d) hyperpolarization
28. Temporal summation occurs when the same pre-synaptic neuron stimulates a post-synaptic neuron close
together in time, true or false
29. The hippocampus plays an important role in long-term memory, true or false
30. The fibers of the sympathetic nervous system arise from the brain and sacral spinal cord, true or false.
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