Long Exam 2

What is anatomy?

Anatomy is the branch of biology that focuses on the structures of organisms, encompassing the study of their internal and external parts.

What does physiology refer to?

Physiology is the scientific study of the biological functions and processes that organisms perform, including how organs and systems interact.

Define homeostasis.

Homeostasis is the process by which living organisms maintain a stable internal environment, crucial for survival, despite changes in external conditions.

What processes maintain homeostasis in animals?

Homeostasis in animals is regulated through negative and positive feedback mechanisms that help stabilize internal conditions.

What is negative feedback?

Negative feedback is a regulatory mechanism that counteracts deviations from a set point, ensuring stability within a biological system by reversing changes.

How does positive feedback differ from negative feedback?

Positive feedback enhances or amplifies changes in a system, pushing it away from its initial state, often leading to dramatic outcomes like childbirth.

What are endothermic animals?

Endothermic animals, such as birds and mammals, are capable of regulating their body temperature by generating heat through metabolic processes.

What are ectothermic animals?

Ectothermic animals, including most reptiles and invertebrates, rely on external environmental sources to regulate their body temperature.

What is acclimatization?

Acclimatization is the process through which an organism adjusts its physiological processes to adapt to changes in the external environment over time.

Define poikilotherm.

A poikilotherm is an organism whose body temperature fluctuates with the external environment, lacking internal temperature regulation.

Define homeotherm.

A homeotherm is an organism that maintains a relatively constant internal body temperature, regardless of environmental changes.

What are the four physical processes of heat exchange?

The four physical processes of heat exchange are radiation (transfer of heat through space), evaporation (loss of heat through moisture), convection (heat transfer through fluid movement), and conduction (direct transfer of heat between materials).

What is the function of epithelial tissue?

Epithelial tissue functions primarily to protect body surfaces, line organs and cavities, and is involved in absorption, secretion, and sensation.

What type of epithelial tissue is involved in absorption and secretion in the digestive tract?

Simple columnar epithelium is the type of epithelial tissue responsible for absorption and secretion in the digestive tract, providing a barrier and facilitating nutrient transfer.

What is the primary role of connective tissue?

The primary role of connective tissue is to support and bind other tissues and organs together, providing structural integrity and stability.

What are fibroblasts?

Fibroblasts are specialized cells located in connective tissue that produce collagen and other extracellular matrix components, crucial for tissue repair and maintenance.

What type of muscle tissue is responsible for voluntary movements?

Skeletal muscle is the type of muscle tissue responsible for voluntary movements, allowing for purposeful motion and control over the skeletal system.

What is the main function of nervous tissue?

Nervous tissue's main function is to receive, process, and transmit information throughout the body, coordinating responses and facilitating communication.

What are the two distinct layers of the integumentary system?

The integumentary system consists of two primary layers: the epidermis (the outer protective layer) and the dermis (the underlying supportive layer).

What is the primary pigment responsible for skin color protection from UV light?

Melanin is the pigment primarily responsible for skin color and offers protection against the harmful effects of ultraviolet (UV) radiation.

What is the skeletal system?

The skeletal system is a complex framework of bones and cartilage that provides structural support, protection for vital organs, facilitates movement through joints, and serves as a site for mineral storage and blood cell production.

What are the major divisions of the skeletal system?

The skeletal system is divided into two main sections: the axial skeleton (comprising the skull, vertebral column, and rib cage) and the appendicular skeleton (including the limbs and pelvic girdle).

What is the function of the vertebral column in the skeletal system?

The vertebral column, or spine, protects the spinal cord, supports the head, and allows for flexibility and movement of the torso.

What are the main types of bone tissue?

The main types of bone tissue are compact bone, which is dense and forms the outer layer of bones, and spongy bone, which is lighter and found within the interior, helping to reduce weight while maintaining strength.

What is the role of joints in the skeletal system?

Joints are flexible connections between bones that allow for movement and provide range of motion, varying from immovable to freely movable.

How do bones develop during growth?

Bones develop through a process called ossification, where cartilage is gradually replaced by bone tissue