Expert Maths & Science Tutoring

MS1

- An organ is a group of tissues that work together to perform a specific function (1)

MS2

- Villi increase surface area for absorption (1)

- Microvilli further increase surface area (1)

- Capillary network in villi provides blood flow for nutrient transport (1)

- Mucus protects the lining of the intestine (1)

MS3

- Fibroblasts (1)

- Produce collagen and other fibers that give connective tissue its strength (1)

- Also produce ground substance (1)

MS4

- Smooth muscle:

- Involuntary/not controlled by conscious thought (1)

- Found in hollow organs, such as the intestines (1)

- Cardiac muscle:

- Involuntary/not controlled by conscious thought (1)

- Found only in the heart (1)

MS5

- When body temperature rises, blood vessels in the nasal cavity dilate (1)

- This increases blood flow to the surface, promoting heat loss (1)

MS6

- Pressure difference = 20 mmHg (1)

- Pressure difference is important because it drives blood flow through the arteries (1)

- Provides oxygen and nutrients to tissues (1)

- Removes waste products (1)

MS7

- Squamous

- Cuboidal

- Columnar

- Ciliated

MS8

- Long dendrites receive signals from other neurons (1)

- Long axon transmits signals to muscles or other neurons (1)

- Myelin sheath insulates the axon, allowing for faster signal transmission (1)

MS9

- Oxygen uptake plateaus at higher exercise intensities (1)

- This indicates that the person is reaching their maximum oxygen uptake capacity (1)

- At lower exercise intensities, oxygen uptake increases more quickly (1)

- This shows that the person is becoming more efficient at using oxygen to produce energy (1)

MS10

- White blood cells (WBCs) attack and destroy pathogens (1)

- Antibodies bind to and neutralize pathogens (1)

- Memory cells remember specific pathogens and provide a faster response to future infections (1)