12 most important MCQs for MDCAT and NEET 2022 with answer key:

1. Which of the following muscle get fatigued easily:
a. Smooth muscle
b. Cardiac muscle
c. Skeletal muscle
d. None
2. The muscle which has a greater role in breathing:
a. External intercoastal
b. Internal intercoastal
c. Abdominal muscle 
d. Diaphragm
3. Tetanus is a disease of which of the following system:
a. Endocrine system
b. Nervous system
c. Muscular system
d. Respiratory system
4. Hyperpolarization of neurolemma is due to:
a. Huge influx of Na+
b. Delayed closure of voltage-gated Na+ channels
c. Delayed closure of voltage-gated K+ channels
d. None 
5. If the Na+/K+ pump stops working what will happen
a. Nerve impulse can never be generated 
b. Ionic gradient across the neurolemma can not be created
c. There will be nerve impulses all the time 
d. both a and b
6. In the electrograph of a nerve impulse spike potential is due to:
a. Closure of voltage-gated Na+ channels
b. Closure of voltage-gated K+ channels
c. Opening of voltage-gated Na+ channels
d. Opening of voltage-gated K+ channels
7. The fallopian tube is lined with:
a. Ciliated cuboidal epithelium
b. Ciliated columnar epithelium
c. Simple cuboidal epithelium
d. Simple columnar epithelium
8. If a person drinks lots of water what will happen:
a. ADH release is suppressed
b. ADH is released in greater amounts
c. The thirst center is inhibited
d. The thirst center is activated
9. Which of the following hormone is synthesized by the neuroendocrine gland:
a. Adrenaline
b. Thyroxin
c. Thymosin
d. Oxytocin
10. Which type of nerve impulse is more advanced:
a. Electrical
b. Chemical
c. Both 
11. Why nerve impulse is fast in myelinated nerve fibers:
a. Myelin insulates and prevents ionic exchange all across the neurolemma
b. Myelin increase ionic exchange across neurolemma
c. Myelin increases the number of ion channels
d. none of the above correctly describes
12. A congenital heart defect is:
a. Myocardial infarction
b. Atrial septal defect
c. Arteriosclerosis
d. Heart failure
Ans key:
1. c
2. d
3. b
4. c
5. d
6. a
7. b
8. a
9. d
10. b
11. a
12. b
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