Muscle and Nervous System Anatomy

The thin filament in muscle fibers is composed of actin, tropomyosin, and troponin. Myosin is the protein that makes up the thick filament.

Chewing muscles, also known as masticatory muscles, are attached to the mandible (lower jaw) to facilitate chewing.

The diencephalon, a part of the brain, houses the thalamus (relay station for sensory information) and the hypothalamus (regulates body functions like hunger and thirst).

Cerebrospinal fluid (CSF) circulates within the subarachnoid space, a region between the arachnoid mater and the pia mater, providing cushioning and protection for the brain and spinal cord.

Skeletal muscles are under voluntary control, meaning they require stimulation from somatic motor neurons to contract. Smooth and cardiac muscles are involuntary.

The occipital lobe houses the primary visual cortex, which processes visual information from the eyes.

The temporal lobe is home to the primary auditory cortex, which processes sound from the ears.

Myelin, a fatty insulating material, surrounds axons to increase the speed of action potential transmission. This process is known as myelination.

The initial phase of an action potential, marked by a rapid increase in membrane potential due to the influx of sodium ions.

The intercostal muscles are located between the ribs and play a crucial role in breathing by expanding and contracting the chest cavity.

The peroneus longus muscle is a long muscle located in the lower leg that helps with foot movements, particularly eversion (turning the sole of the foot outwards).

The hypothalamus is a key brain region that controls vital functions like regulating body temperature, influencing hormone release from the pituitary gland, and controlling hunger and thirst.

Actin is a protein that forms thin filaments in muscle fibers. It interacts with myosin to create muscle contraction.

The initial phase of an action potential, where the membrane potential becomes more positive due to the influx of sodium ions.

The intercostal muscles are located between the ribs and help with breathing by expanding and contracting the chest cavity.

Troponin is a protein within the muscle fiber that binds to calcium ions, initiating a cascade of events that lead to muscle contraction.

The peroneus longus muscle is situated in the lower leg and helps with foot movements, especially eversion, which is turning the sole of the foot outward.

The hypothalamus is located in the brain and acts as a 'control center' for vital functions like body temperature regulation, hormone release, and appetite.

The thin filament in muscle fibers is made of actin, tropomyosin, and troponin. Myosin is part of the thick filament.

Chewing muscles must attach to the mandible, or lower jaw, to allow for the movement of the jaw during chewing.

Skeletal muscles are voluntary muscles, meaning they require stimulation from somatic motor neurons to contract. Smooth and cardiac muscles are involuntary.

The occipital lobe processes visual information from the eyes via the primary visual cortex.

The temporal lobe contains the primary auditory cortex, which processes sound from the ears.

Myelin is a fatty insulating material that surrounds axons, increasing the speed of action potentials along the axon. This process is called myelination.