Neural Control and Coordination Chapter-Wise Test 14

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which type of receptor detects changes in blood pressure and is found in the walls of arteries?

Chemoreceptors
Mechanoreceptors
Baroreceptors
Thermoreceptors
3

Baroreceptors, found in arterial walls, detect changes in blood pressure and help regulate it.

Which of the following statements about synaptic transmission is incorrect?

Neurotransmitters are released from the axon terminal.
Neurotransmitters cross the synaptic cleft and bind to receptors on the presynaptic membrane.
Synaptic transmission can be excitatory or inhibitory.
Calcium ions play a role in neurotransmitter release.
2

Neurotransmitters bind to receptors on the postsynaptic membrane, not the presynaptic membrane.

Which neurotransmitter is primarily involved in mood regulation and is linked to depression?

Dopamine
Serotonin
Acetylcholine
GABA
2

Serotonin is a neurotransmitter involved in mood regulation, and its deficiency is associated with depression.

Which neurotransmitter is involved in the transmission of nerve impulses across a chemical synapse?

Insulin
Acetylcholine
Thyroxine
Glucagon
2

Acetylcholine is a key neurotransmitter that facilitates signal transmission at chemical synapses.

Which type of neuron is responsible for connecting sensory and motor neurons?

Afferent neurons
Efferent neurons
Interneurons
Sensory neurons
3

Interneurons act as connectors between sensory and motor neurons, processing and transmitting signals within the CNS.

Which of the following best describes the function of an interneuron?

Carries impulses from the CNS to muscles
Transmits sensory impulses to the CNS
Connects sensory and motor neurons
Detects stimuli from the external environment
3

Interneurons act as a bridge between sensory and motor neurons, helping process and relay information.

Which part of the brainstem controls involuntary actions such as breathing and heart rate?

Midbrain
Pons
Medulla oblongata
Cerebellum
3

The medulla oblongata regulates involuntary functions such as breathing, heart rate, and blood pressure.

Which of the following statements about the thalamus is incorrect?

It acts as a relay station for sensory signals to the cerebrum.
It processes information related to touch, pain, and temperature.
It is directly involved in voluntary muscle control.
It plays a role in regulating alertness and consciousness.
3

Voluntary muscle control is regulated by the motor cortex in the cerebrum, not the thalamus.

What is the role of the sodium-potassium pump in a neuron?

Transports neurotransmitters across the synapse
Maintains resting membrane potential
Triggers the release of neurotransmitters
Generates action potential
2

The sodium-potassium pump maintains the resting membrane potential by actively transporting Na⁺ out and K⁺ into the neuron.

Which of the following statements about the autonomic nervous system is correct?

It regulates involuntary functions like digestion and respiration.
It only controls voluntary muscle movements.
It consists only of the sympathetic division.
It does not influence heart rate.
1

The autonomic nervous system regulates involuntary functions such as digestion, respiration, and heart rate.

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