Biology - Comprehensive Mock Test 21

Question 201 Medium

When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is ?

A) Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions B) Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions C) Equally permeable to both Na+ and K+ ions D) Impermeable to both Na+ and K+ ions

---

Solution Breakdown:

No Details

Question 202 Medium

The thin and convoluted outer layer of gray matter that covers the cerebral hemispheres is ?

A) Medulla oblongata B) Thalamus C) Cerebral cortex D) Meninges

---

Solution Breakdown:

No Details

Question 203 Medium

The protein carrier in the membrane, called sodium-potassium pump pumps ______ ?

A) Both Na+ and K+ in B) Both Na+ and K+ out C) Na+ in and K+ out D) Na+ out and K+ in

---

Solution Breakdown:

No Details

Question 204 Medium

The generation of excitation-contraction coupling involves all the following events except ?

A) Generation of end-plate potential B) Release of calcium from troponin C) Formation of cross-linkages between actin and myosin D) Hydrolysis of ATP to ADP

---

Solution Breakdown:

No Details

Question 205 Medium

The difference in voltage between the inside and outside of a cell is called ______ ?

A) Spike potential B) Action potential C) Resting potential D) Reaction potential

---

Solution Breakdown:

No Details

Question 206 Hard

The difference in charge between inside and outside environment (change in voltage) of the nerve cell membrane is measured by ______ ?

A) Oscilloscope B) Electrocardiogram C) Stethoscope D) Laparoscope

---

Solution Breakdown:

No Details

Question 207 Medium

Which portion of the brain is responsible for various emotions such as pleasure, fear, and happiness?

A) Thalamus B) Reticular formation C) Hypothalamus D) Limbic system

---

Solution Breakdown:

No Details

Question 208 Medium

The basic cyclic pattern of inspiration and expiration are established by a respiratory center within the ______ ?

A) Cerebellum B) Medulla oblongata C) Cerebral cortex D) Thalamus

---

Solution Breakdown:

No Details

Question 209 Medium

Spinal cord and brain are wrapped in protective membranes known as ______ ?

A) Axomembranes B) Meninges C) Nodes of Ranvier D) Myelin sheath

---

Solution Breakdown:

No Details

Question 210 Easy

Skeletal muscles are controlled by ______ ?

A) Sympathetic nerves B) Parasympathetic nerves C) Somatic nerves D) Autonomic nerves

---

Solution Breakdown:

No Details