Animal Anatomy And Physiology - Muscles

The correct answer is true. The numbers 15-17 refer to the brachiocephalicus muscle, specifically its cervical part.

The Accessory carpal bone is indeed known as Number 2.

The correct answer is masseter muscle. The masseter muscle is one of the muscles responsible for chewing and is located in the jaw area. It is a powerful muscle that helps in closing the jaw and is important for biting and grinding food.

Skeletal muscles are responsible for moving bones. They are attached to bones via tendons and when they contract, they pull on the bones, causing movement. This movement allows us to perform various activities such as walking, running, and lifting objects. Without the contraction of skeletal muscles, our bones would not be able to move, resulting in immobility.

Skeletal muscles generate heat because they are responsible for the majority of body heat production. When muscles contract and relax, they produce energy through metabolic processes, which results in the generation of heat. This heat helps to maintain the body's temperature and is especially important during physical activity or in cold environments.

The given statement is true. Number 22 refers to the deep pectoral muscle.

When a nerve impulse reaches a muscle fiber, it triggers the release of calcium ions from the sarcoplasmic reticulum. Calcium ions are crucial for muscle contraction as they bind to proteins called troponin, causing a conformational change that allows myosin heads to bind to actin filaments. This interaction between myosin and actin initiates the sliding of the filaments, leading to muscle contraction. Therefore, calcium ions play a vital role in starting the contraction process in a muscle fiber.

The masseter muscle is the correct answer because it is one of the main muscles involved in chewing. It is located in the jaw and helps to close the mouth and move the jaw up and down. The temporalis muscle is also involved in chewing, but the masseter muscle is more commonly associated with this function. The sterno-occipitalis muscle is located in the neck and is not directly involved in chewing. The parotid salivary gland is responsible for producing saliva and is not a muscle.

ATP, or adenosine triphosphate, is the molecule that acts as the "batteries" to power the sliding of the actin and myosin filaments in muscle. ATP is a high-energy molecule that provides the necessary energy for muscle contraction. When ATP is broken down into ADP (adenosine diphosphate) and inorganic phosphate, energy is released, which is then used to power the sliding of the actin and myosin filaments, leading to muscle contraction. Therefore, ATP is essential for the functioning of muscles.

The correct answer is the cephalic vein. The cephalic vein is a major blood vessel located in the upper arm and forearm. It is often used for venipuncture or intravenous therapy. It runs along the lateral side of the arm, starting from the hand, passing through the forearm, and ending in the shoulder region. It is easily visible and palpable, making it a common choice for medical procedures.

The given statement is true. Number 4 is indeed the "Gluteofemoralis muscle".

The extensor retinaculum is a strong band of fascia that holds the cranial tibial muscle in position. It acts as a support structure, keeping the muscle in place and preventing it from moving or shifting during movement. This helps to maintain stability and proper functioning of the muscle.

The correct answer is Triceps brachii muscle. This muscle is located in the upper arm and is responsible for extending the forearm at the elbow joint. It has three heads - the long head, lateral head, and medial head, hence the name "triceps". The triceps brachii muscle is important for movements such as pushing, throwing, and punching.

The nuclei of skeletal muscles are multiple. This means that each muscle fiber contains multiple nuclei, which are located on the periphery of the cell. This is in contrast to other cell types, where the nucleus is typically located in the center of the cell. The multiple nuclei in skeletal muscle fibers are necessary for the maintenance and repair of the muscle tissue, as they provide the necessary genetic material and cellular machinery for protein synthesis and muscle growth.

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The correct answer is "Lateral Saphenous vein, saphenous vein". The question is asking for the name of a specific vein, and the correct answer is providing two options: the Lateral Saphenous vein and the saphenous vein. These are both veins in the human body, and either one could be the correct answer depending on the context of the question.

The correct answer is Thoracolumbar fasciae. The thoracolumbar fasciae is a group of connective tissues that provide support and stability to the muscles and organs in the lower back and abdomen. It helps to maintain proper posture and allows for movement and flexibility in the trunk region. The other options, Latissimus dorsi muscle, Temporalis muscle, and External columnar muscle, are specific muscles in the body and are not the correct answer to the question.

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Trick question!

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The structure number 1 refers to the parotid salivary gland.

The parotid duct is a tube-like structure that carries saliva from the parotid gland to the mouth. It is located in the cheek and opens into the mouth opposite the upper second molar tooth. This duct plays a crucial role in the production and delivery of saliva, which aids in the digestion of food and keeps the mouth moist.

The correct answer is Deltoid muscle, Spinous part of deltoid muscle. The deltoid muscle is a large muscle located in the shoulder region. It is responsible for the abduction, flexion, and extension of the arm. The spinous part of the deltoid muscle refers to the posterior or back part of the muscle. It helps in the extension and rotation of the arm.

It is the median nerve!

The correct answer is Superficial Brachial Fasciae.

The external jugular vein in cats is a prominent vessel located superficially on either side of the neck. It plays a critical role in returning deoxygenated blood from the head, face, and neck regions to the heart via the cranial vena cava. Veterinarians commonly use this vein for venipuncture due to its accessibility and size. It is an important anatomical landmark in both clinical procedures and feline anatomy studies. Its function parallels that in other mammals, emphasizing its physiological significance.

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The A band is the correct answer because it is the region of the skeletal muscle cell where thick filaments, composed of the contractile protein myosin, are found. These thick filaments overlap with thin filaments, made up of the contractile protein actin, which are found in the lighter regions of the muscle cell called the I bands. Therefore, the A bands are responsible for the dark bands observed in skeletal muscle cells.

The green structure labelled number 11 is the molar salivary gland.

The correct answer is Gluteal fascia. The gluteal fascia is a layer of connective tissue that covers the gluteal muscles, providing support and protection. It helps to maintain the shape and structure of the buttocks and plays a role in the movement and stability of the hip joint.

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The correct muscle name for muscle #4 is Cleidocephalicus muscle.

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The correct answer is the Common digital extensor muscle.

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The digital annular ligaments are structures in the horse's limb that hold the tendons in place as they pass over the back of the fetlock joint. These ligaments create a tunnel-like structure that helps to keep the tendons in proper alignment and prevent them from bowing or deviating from their intended path.

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The I band is the correct answer because it is the region of the sarcomere that contains only thin filaments. The I band appears lighter under a microscope due to the absence of thick filaments.

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The correct answer is tendons of deep digital flexor muscle and tendons of deep digital flexor. These are referring to the tendons of a specific muscle called the deep digital flexor, which is responsible for flexing the digits or fingers. The tendons of this muscle are important for movement and control of the fingers.

The Platysma muscle is the correct answer because it is the #1 muscle being referred to in the question. The other options mentioned are not the #1 muscle. The Platysma muscle is a thin muscle that stretches from the chest to the jaw and is responsible for various facial expressions, including lowering the jaw and lip movements.

A sarcomere is the area from one Z line to the next Z line and is the basic contracting unit of skeletal muscle. Many sarcomeres lined up end-to-end form a myofibril. Each individual sarcomere in a myofibril only shortens slightly when the fiber is stimulated to contract, but when all the sarcomere contractions are added together, the muscle fiber shortens considerably.

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The explanation for the given correct answer is that number 15 refers to the area for temporal muscles. This means that the statement "Number 15 is the area for temporal muscles" is true.

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The correct answer is Sterno-occipitalis muscle. This muscle is located in the neck region and connects the sternum to the occipital bone. It helps in movements of the head and neck, such as flexion and extension.