Skeletal Muscle

Q.

In humans what percentage of body weight is contributed by muscles?

1. 70-80%

2. 20-30%

3. 40-50%

4. 60-70%

Q.

In a neuron, conversion of the electrical signal to a chemical signal occurs at/in

1. cell body

2. axonal end

3. dendritic end

4. axon

Q. The type of muscle present in our

1. Heart is involuntary and unstriated smooth muscle
2. Intestine is striated and voluntary
3. Upper arm is smooth muscle and fusiform in shape
4. Thigh is striated and voluntary

Q. Biceps and triceps are

1. Both a & c
2. Antagonistic muscles
3. Complementary muscles
4. Involuntary muscles

Q.

Which of the following are not antagonistic muscles?

1. Flexor and extensor

2. Pronator and supinator

3. Abductor and adductor

4. Protractor and supinator

Q.

Voluntary muscles are found in

1. Alimentary canal

2. Limbs

3. Iris of eye

4. Bronchi of lungs

Q. The given diagram represents the Malpighian body. Identify A to D-

1. A – Afferent arteriole, B – Efferent arteriole, C – Bowman’s capsule, D – Proximal convoluted tubule.
2. A – Afferent arteriole, B – Efferent arteriole, C – Renal corpuscle, D – proximal convoluted tubule
3. A – Afferent arteriole, B – Efferent arteriole, C – Bowman’s capsule, D – DCT
4. A – Efferent arteriole, B – Afferent arteriole, C – Bowman’s capsule, D-DCT

Q. Choose the correct sequence of events in case of sliding filament theory:
I. Acetylcholine generates an action potential in the sarcolemma
II. F-actin binds myosin head
III. Inflow of Na+ ions
IV. CNS sends the command via motor neuron and the signal reaches the
neuromuscular junction
V. Thin filament moves inwards and reduces the length of I band
VI. Calcium ions release into the sarcoplasm
VII. Conformational changes in the troponin

1. I → II → III → IV → V → VI → VII
2. IV → I → III → VI → VII → II → V
3. IV → I → VI → III → V → VII → II
4. IV → I → VI → III → VII → II → V

Q.

Mention three features of cardiac muscles

Q. Rearrange the following in the correct order of involvement in electrical impulse movement-Synaptic knob, dendrites, cell body, Axon terminal, Axon

Q.

How do you distinguish between a skeletal muscle and a cardiac muscle?

Q. Which of the following is common in skeletal and cardiac muscles ?

1. Voluntary
2. Involuntary
3. Striated
4. None of the above

Q.

Which of the following is not an involuntary action?

1. Vomiting

2. Salivation

3. Heartbeat

4. Chewing

Q. Identify the events occurring in muscular contraction;

1. i, iii, iv, v
2. ii, iv, v
3. i, ii, iii
4. i, ii, v

Q. Which part of the limbic system converts information from short term to long-term memory, essential in learning?

1. Basal ganglia
2. Hypothalamus
3. Amygdala
4. Hippocampus

Q. Which is incorrectly paired?

1. Thighs : skeletal muscle
2. Heart : involuntary, striated muscle
3. Blood vessel : unstriated muscle
4. Iris and ciliary muscle : involuntary, striated muscle

Q. While eating peach or pear it is usually seen that some stone-like structures get entangled in the teeth. What are these stone-like structures called?

Q.

The papillary muscles are useful in

1. Closing and opening the valves of the heart

2. Movement of pinnae

3. Movement of eyeballs

4. Movement of eyelids

Q.

Which of these muscles are striated and voluntary?

1. Skeletal muscles

2. Smooth and cardiac muscles

3. Cardiac muscles

4. Skeletal and cardiac muscles

Q. Write the function of

a. Sieve tube

b. Interfascicular cambium

c. Collenchyma

d. Aerenchyma

Q.

How can you make your cardiac muscle work harder?

Q. Comment upon the hormonal regulation of selective reabsorption.

Q. Biceps and triceps are

1. Antagonistic muscles
2. Complementary muscles
3. Involuntary muscles
4. Both a & c

Q. The type of muscle present in our

1. Heart is involuntary and unstriated smooth muscle
2. Intestine is striated and voluntary
3. Thigh is striated and voluntary
4. Upper arm is smooth muscle and fusiform in shape

Q.

What Is difference between voluntary and involuntary muscles?

Q.

What are nerves? Classify them in different types with an example for each.

Q.

What are the muscles of the Quadriceps?

Q.

What is the chief function of collenchyma?

Q. When we peel the skin of a potato tuber, we remove

1. Sapwood
2. Epidermis
3. Cuticle
4. Periderm

Q. Digestive system has ............. muscles.

1. Voluntary
2. Involuntary
3. Cardiac
4. All of the above