Neural Control and Coordination Chapter-Wise Test 16

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which neurotransmitter is responsible for the transmission of signals at the neuromuscular junction?

Dopamine
Serotonin
Acetylcholine
Glutamate
3

Acetylcholine is the neurotransmitter that facilitates communication between neurons and muscles at the neuromuscular junction.

Which division of the autonomic nervous system is responsible for preparing the body for stress or emergencies?

Somatic nervous system
Parasympathetic nervous system
Sympathetic nervous system
Central nervous system
3

The sympathetic nervous system triggers the "fight-or-flight" response during stress or emergencies.

Which part of the neuron is responsible for transmitting nerve impulses away from the cell body?

Dendrites
Axon
Synaptic cleft
Nissl’s granules
2

The axon transmits nerve impulses away from the neuron's cell body.

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

The peripheral nervous system consists of sensory and motor neurons.
The central nervous system includes only the spinal cord.
Neurons can function without generating action potentials.
Neuroglial cells generate and transmit nerve impulses.
1

The peripheral nervous system (PNS) includes sensory neurons that bring information to the CNS and motor neurons that relay commands from the CNS.

Which of the following statements about synapses is incorrect?

Synapses are junctions between two neurons.
Electrical synapses allow direct ion flow between neurons.
Chemical synapses use neurotransmitters for signal transmission.
All synapses in the human body are electrical synapses.
4

Both chemical and electrical synapses exist in the human body, but most synapses are chemical.

Which type of neural system is found in lower invertebrates like Hydra?

Centralized neural system
Peripheral neural system
Nerve net
Segmented ganglia
3

Hydra has a simple network of neurons called a nerve net, which lacks a central control system.

Which part of the brain is primarily responsible for maintaining homeostasis?

Thalamus
Cerebellum
Hypothalamus
Medulla oblongata
3

The hypothalamus regulates body temperature, hunger, thirst, and various homeostatic processes.

What is the primary function of cerebrospinal fluid (CSF)?

Facilitates nerve impulse conduction
Provides cushioning and removes metabolic waste
Acts as a neurotransmitter
Transmits signals between neurons
2

Cerebrospinal fluid (CSF) cushions the brain and spinal cord while also removing metabolic waste.

What is the primary function of the sympathetic nervous system?

Promotes rest and digestion
Regulates voluntary muscle movements
Prepares the body for stress and emergencies
Controls circadian rhythms
3

The sympathetic nervous system activates the "fight-or-flight" response, preparing the body for stress and emergencies.

What is the role of the nodes of Ranvier in a myelinated neuron?

Store neurotransmitters
Regenerate axons
Facilitate saltatory conduction
Generate myelin sheath
3

The nodes of Ranvier allow saltatory conduction, where the nerve impulse jumps from node to node, increasing conduction speed.

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