Wk 6 Biomedical Science PT 1

What are the types of muscle tissue?

The three types of muscle tissue are skeletal, cardiac, and smooth muscle, each with distinct structures and functions.

What is the purpose of skeletal muscle tissue?

Skeletal muscle tissue is responsible for voluntary movement of the skeleton, enabling locomotion and manipulation of the environment.

Where is cardiac muscle tissue located, and what is its purpose?

Cardiac muscle tissue is located in the heart. Its purpose is to pump blood throughout the body involuntarily.

What are the specializations of smooth muscle tissue?

Smooth muscle tissue is found in the walls of hollow organs (like the intestines and blood vessels) and is responsible for involuntary movements such as peristalsis and regulation of blood flow.

Contrast the structure of skeletal, cardiac, and smooth muscle tissues.

Skeletal muscle is striated and multi-nucleated, cardiac muscle is striated with one or two nuclei and has intercalated discs, while smooth muscle is non-striated and has a single nucleus.

What is the mode of control for skeletal muscle?

Skeletal muscle is under voluntary control, allowing conscious regulation of muscle movements.

What is the mode of control for cardiac and smooth muscle?

Both cardiac and smooth muscles are under involuntary control, meaning they are regulated unconsciously by the autonomic nervous system.

What are the main functions of nervous tissue?

The main functions of nervous tissue are to transmit impulses, process information, and coordinate responses throughout the body.

What are the structural features of nervous tissue?

Nervous tissue is composed of neurons (nerve cells) that transmit signals and glial cells that support and protect neurons.

What is the difference between organs and tissues?

Tissues are groups of similar cells performing a specific function, while organs are composed of two or more different types of tissues working together to perform complex functions.

Describe the structure of skin and its functions.

The skin consists of multiple layers including the epidermis (outer layer), dermis (middle layer), and subcutis (deeper layer). Its functions include protection, sensation, and regulation of body temperature.

How does the skin replenish itself?

The skin replenishes itself through the continuous shedding and renewal of epidermal cells, facilitated by the regenerative capacity of basal cells in the epidermis.

Provide an example of an organ comprised of two types of tissue.

The heart is made up of muscular tissue (cardiac muscle) and connective tissue (to form the heart structure).

Provide an example of an organ comprised of three types of tissue.

The stomach includes epithelial tissue (lining), muscular tissue (smooth muscle layer), and connective tissue (supportive connective tissues).

Provide an example of an organ comprised of four different tissue types.

The skin is comprised of epithelial tissue (epidermis), connective tissue (dermis), muscle tissue (smooth muscle in blood vessels), and nervous tissue (sensory neurons).

What is a system in a biological context?

A system is a group of related organs that work together to perform specific functions in the body. Examples include the digestive system and the respiratory system.

Why is the integration of systems important in the body?

The integration of systems allows for coordinated functions and responses, ensuring that the body operates efficiently and maintains homeostasis.

What are the main organs of the cardiovascular system?

The main organs of the cardiovascular system include the heart, blood vessels (arteries, veins, and capillaries), and blood itself.

How do the tissues in the heart facilitate its function?

The heart contains muscular tissue (cardiac muscle for contraction), connective tissue (support and structure), epithelial tissue (lining of blood vessels), and nervous tissue (regulation of heart rate and rhythm).

How does epithelial tissue function in body systems?

Epithelial tissue lines and protects surfaces, such as the skin and organ linings, facilitating absorption, secretion, and sensation.

What role does connective tissue play in the integration of systems?

Connective tissue provides structural support, connects different tissues and organs, and helps in the transport of substances (like blood).

What is the role of muscle tissue in the body systems?

Muscle tissue, including skeletal, smooth, and cardiac muscle, enables movement and contraction within various systems, like locomotion in the skeletal system and pumping in the cardiovascular system.

How does nervous tissue contribute to system integration?

Nervous tissue transmits signals across the body, allowing for communication and coordination among different organ systems, such as reflex actions and responses to stimuli.