17.Which one of the following statements is true regarding voluntary and involuntary responses?
A.Voluntary responses control the activity of glands.
B.Involuntary responses are part of the autonomic system.
C.Voluntary responses originate in the sensory receptors.
D.Involuntary responses may include the spinal cord and not the brain.
I think the answer is B, but I'm not sure. I know that involuntary responses originate in the somatic system, but I think they also occur in the autonomic system.
hmm
You are partially correct. The statement "Involuntary responses are part of the autonomic system" is correct. Involuntary responses, such as the beating of the heart or digestion, are regulated by the autonomic nervous system, which controls body functions that are not under conscious control.
However, the statement "Voluntary responses originate in the sensory receptors" is incorrect. Voluntary responses originate in the motor cortex of the brain, not in the sensory receptors. The motor cortex sends signals to the muscles, allowing us to consciously control our movements.
The statement "Voluntary responses control the activity of glands" is also incorrect. Voluntary responses do not directly control the activity of glands. Glands are primarily regulated by the autonomic nervous system.
So, the correct answer is B: Involuntary responses are part of the autonomic system.
To determine the correct answer, let's analyze each statement and see if it accurately describes voluntary and involuntary responses:
A. Voluntary responses control the activity of glands.
This statement is not true. Voluntary responses are consciously controlled actions that involve skeletal muscles, such as moving your arm or speaking. The activity of glands is controlled by involuntary or autonomic responses.
B. Involuntary responses are part of the autonomic system.
This statement is true. Involuntary responses, also known as reflex actions, are controlled by the autonomic nervous system (ANS). The ANS controls involuntary actions like heartbeat, digestion, and breathing.
C. Voluntary responses originate in the sensory receptors.
This statement is not true. Voluntary responses are initiated by the motor cortex in the brain, not sensory receptors. Sensory receptors are responsible for receiving and transmitting sensory information to the brain.
D. Involuntary responses may include the spinal cord and not the brain.
This statement is not entirely true. Involuntary responses can involve both the spinal cord and the brain. For instance, reflexes like the knee-jerk reflex involve the spinal cord alone, while other involuntary responses like regulating body temperature involve both the spinal cord and the brain.
Based on these explanations, the correct answer is B. Involuntary responses are part of the autonomic system.