Foot Health Practitioner - Qp6

Explanation
The nervous system is divided into two principal divisions: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord, which are responsible for processing and coordinating information. The PNS includes all the nerves that connect the CNS to the rest of the body, allowing for communication between the brain and the organs, muscles, and sensory receptors. Therefore, the correct answer is the central nervous system and the peripheral nervous system.

Explanation
Noradrenalin and dopamine are commonly recognized neurotransmitters in the brain. Noradrenalin is involved in regulating attention, alertness, and stress response, while dopamine plays a role in motivation, reward, and movement. Both neurotransmitters are important for communication between nerve cells and are involved in various physiological and psychological processes.

Explanation
The cerebellum, cerebrum, and brain stem are the three main parts of the brain. The cerebellum is responsible for coordinating voluntary movements and maintaining balance and posture. The cerebrum is the largest part of the brain and is responsible for conscious thought, memory, and processing sensory information. The brain stem connects the brain to the spinal cord and controls basic functions such as breathing, heart rate, and blood pressure.

Explanation
The lumbar and sacral plexuses are nerve networks located in the lower back and pelvis. These plexuses give rise to several major nerves, including the femoral nerve, obturator nerve, and sciatic nerve. Therefore, the statement that the lumbar and sacral plexuses give rise to the femoral nerve, obturator nerve, and sciatic nerve is true.

Explanation
The statement is false because the knee-jerk reflex is actually an involuntary reflex. It is a rapid and automatic response to a stimulus, such as tapping the patellar tendon below the kneecap. This reflex involves the contraction of the quadriceps muscle, causing the leg to extend. It is not under conscious control and does not serve to stop us from collapsing at the knee.