WGU Anatomy and Physiology 1-
Questions and answers well explained
What is the primary function of the cell membrane in human cells?
✔️✔️ It regulates what enters and leaves the cell while maintaining homeostasis
How does diffusion differ from facilitated diffusion?
✔️✔️ Diffusion occurs without transport proteins, while facilitated diffusion requires membrane
proteins
What role do mitochondria play in a cell?
✔️✔️ They produce ATP through cellular respiration
What is the function of ribosomes in a cell?
✔️✔️ They synthesize proteins
How does osmosis affect cell volume?
✔️✔️ It causes water to move across a membrane, changing cell size depending on solute
concentration
What is the function of the nucleus?
✔️✔️ It stores DNA and controls cell activities
What is a tissue?
✔️✔️ A group of similar cells working together to perform a specific function
How are epithelial tissues specialized?
✔️✔️ They are specialized for protection, absorption, and secretion
What is the main function of connective tissue?
✔️✔️ To support, bind, and protect other tissues
What distinguishes muscle tissue from other tissue types?
✔️✔️ Its ability to contract and produce movement
What is the role of nervous tissue?
✔️✔️ To transmit electrical signals for communication
How does the integumentary system protect the body?
✔️✔️ It acts as a barrier against pathogens, regulates temperature, and prevents water loss
1
,What is the function of melanin in the skin?
✔️✔️ It protects against ultraviolet radiation
How does the skeletal system support the body?
✔️✔️ It provides structure, protection, and aids in movement
What is the function of bone marrow?
✔️✔️ It produces blood cells
What is the role of calcium in bones?
✔️✔️ It provides strength and hardness
How do joints contribute to movement?
✔️✔️ They allow bones to move relative to each other
What is a synovial joint?
✔️✔️ A freely movable joint containing synovial fluid
What is the function of cartilage?
✔️✔️ To reduce friction and absorb shock in joints
What is the main function of the muscular system?
✔️✔️ To produce movement and maintain posture
How do skeletal muscles differ from smooth muscles?
✔️✔️ Skeletal muscles are voluntary, while smooth muscles are involuntary
What is the function of tendons?
✔️✔️ To connect muscle to bone
What is the role of ligaments?
✔️✔️ To connect bone to bone
How does the nervous system coordinate body activities?
✔️✔️ By sending electrical and chemical signals
What is the central nervous system?
✔️✔️ The brain and spinal cord
What is the peripheral nervous system?
✔️✔️ Nerves outside the brain and spinal cord
What is the function of neurons?
✔️✔️ To transmit nerve impulses
2
,What is a synapse?
✔️✔️ The junction between two neurons
What is the function of neurotransmitters?
✔️✔️ To transmit signals across synapses
What is the role of the endocrine system?
✔️✔️ To regulate body functions through hormones
What is a hormone?
✔️✔️ A chemical messenger secreted into the bloodstream
What is the function of the pituitary gland?
✔️✔️ It controls other endocrine glands
What is the role of the thyroid gland?
✔️✔️ To regulate metabolism
What is the function of insulin?
✔️✔️ To lower blood glucose levels
What is the role of the circulatory system?
✔️✔️ To transport oxygen, nutrients, and wastes
What is the function of red blood cells?
✔️✔️ To carry oxygen
What is hemoglobin?
✔️✔️ A protein in red blood cells that binds oxygen
What is the role of white blood cells?
✔️✔️ To fight infections
What is the function of platelets?
✔️✔️ To help in blood clotting
What is the heart’s main function?
✔️✔️ To pump blood throughout the body
What is the role of arteries?
✔️✔️ To carry blood away from the heart
What is the role of veins?
✔️✔️ To return blood to the heart
3
, What is the function of capillaries?
✔️✔️ To allow exchange of substances between blood and tissues
What is the role of the respiratory system?
✔️✔️ To exchange oxygen and carbon dioxide
What happens in the alveoli?
✔️✔️ Gas exchange occurs
What is the function of the diaphragm?
✔️✔️ It aids in breathing by contracting and relaxing
What is the role of the digestive system?
✔️✔️ To break down food and absorb nutrients
What is the function of the stomach?
✔️✔️ To chemically and mechanically digest food
What is the role of the small intestine?
✔️✔️ To absorb nutrients
What is the function of the large intestine?
✔️✔️ To absorb water and form feces
What is the role of the liver in digestion?
✔️✔️ To produce bile and process nutrients
What is the function of the pancreas?
✔️✔️ To produce digestive enzymes and hormones
What is the role of the urinary system?
✔️✔️ To remove waste and regulate fluid balance
What is the function of the kidneys?
✔️✔️ To filter blood and produce urine
What is the role of nephrons?
✔️✔️ To filter blood at the microscopic level
What is the function of the bladder?
✔️✔️ To store urine
What is the role of the immune system?
✔️✔️ To defend the body against pathogens
4
Questions and answers well explained
What is the primary function of the cell membrane in human cells?
✔️✔️ It regulates what enters and leaves the cell while maintaining homeostasis
How does diffusion differ from facilitated diffusion?
✔️✔️ Diffusion occurs without transport proteins, while facilitated diffusion requires membrane
proteins
What role do mitochondria play in a cell?
✔️✔️ They produce ATP through cellular respiration
What is the function of ribosomes in a cell?
✔️✔️ They synthesize proteins
How does osmosis affect cell volume?
✔️✔️ It causes water to move across a membrane, changing cell size depending on solute
concentration
What is the function of the nucleus?
✔️✔️ It stores DNA and controls cell activities
What is a tissue?
✔️✔️ A group of similar cells working together to perform a specific function
How are epithelial tissues specialized?
✔️✔️ They are specialized for protection, absorption, and secretion
What is the main function of connective tissue?
✔️✔️ To support, bind, and protect other tissues
What distinguishes muscle tissue from other tissue types?
✔️✔️ Its ability to contract and produce movement
What is the role of nervous tissue?
✔️✔️ To transmit electrical signals for communication
How does the integumentary system protect the body?
✔️✔️ It acts as a barrier against pathogens, regulates temperature, and prevents water loss
1
,What is the function of melanin in the skin?
✔️✔️ It protects against ultraviolet radiation
How does the skeletal system support the body?
✔️✔️ It provides structure, protection, and aids in movement
What is the function of bone marrow?
✔️✔️ It produces blood cells
What is the role of calcium in bones?
✔️✔️ It provides strength and hardness
How do joints contribute to movement?
✔️✔️ They allow bones to move relative to each other
What is a synovial joint?
✔️✔️ A freely movable joint containing synovial fluid
What is the function of cartilage?
✔️✔️ To reduce friction and absorb shock in joints
What is the main function of the muscular system?
✔️✔️ To produce movement and maintain posture
How do skeletal muscles differ from smooth muscles?
✔️✔️ Skeletal muscles are voluntary, while smooth muscles are involuntary
What is the function of tendons?
✔️✔️ To connect muscle to bone
What is the role of ligaments?
✔️✔️ To connect bone to bone
How does the nervous system coordinate body activities?
✔️✔️ By sending electrical and chemical signals
What is the central nervous system?
✔️✔️ The brain and spinal cord
What is the peripheral nervous system?
✔️✔️ Nerves outside the brain and spinal cord
What is the function of neurons?
✔️✔️ To transmit nerve impulses
2
,What is a synapse?
✔️✔️ The junction between two neurons
What is the function of neurotransmitters?
✔️✔️ To transmit signals across synapses
What is the role of the endocrine system?
✔️✔️ To regulate body functions through hormones
What is a hormone?
✔️✔️ A chemical messenger secreted into the bloodstream
What is the function of the pituitary gland?
✔️✔️ It controls other endocrine glands
What is the role of the thyroid gland?
✔️✔️ To regulate metabolism
What is the function of insulin?
✔️✔️ To lower blood glucose levels
What is the role of the circulatory system?
✔️✔️ To transport oxygen, nutrients, and wastes
What is the function of red blood cells?
✔️✔️ To carry oxygen
What is hemoglobin?
✔️✔️ A protein in red blood cells that binds oxygen
What is the role of white blood cells?
✔️✔️ To fight infections
What is the function of platelets?
✔️✔️ To help in blood clotting
What is the heart’s main function?
✔️✔️ To pump blood throughout the body
What is the role of arteries?
✔️✔️ To carry blood away from the heart
What is the role of veins?
✔️✔️ To return blood to the heart
3
, What is the function of capillaries?
✔️✔️ To allow exchange of substances between blood and tissues
What is the role of the respiratory system?
✔️✔️ To exchange oxygen and carbon dioxide
What happens in the alveoli?
✔️✔️ Gas exchange occurs
What is the function of the diaphragm?
✔️✔️ It aids in breathing by contracting and relaxing
What is the role of the digestive system?
✔️✔️ To break down food and absorb nutrients
What is the function of the stomach?
✔️✔️ To chemically and mechanically digest food
What is the role of the small intestine?
✔️✔️ To absorb nutrients
What is the function of the large intestine?
✔️✔️ To absorb water and form feces
What is the role of the liver in digestion?
✔️✔️ To produce bile and process nutrients
What is the function of the pancreas?
✔️✔️ To produce digestive enzymes and hormones
What is the role of the urinary system?
✔️✔️ To remove waste and regulate fluid balance
What is the function of the kidneys?
✔️✔️ To filter blood and produce urine
What is the role of nephrons?
✔️✔️ To filter blood at the microscopic level
What is the function of the bladder?
✔️✔️ To store urine
What is the role of the immune system?
✔️✔️ To defend the body against pathogens
4
