BIOS 252 Study guides, Class notes & Summaries

functions of the male reproductive system - ANSWER produce gametes (sperm) synthesis of androgens (males sex hormones) delivery of sperm into the female reproductive tract accessory male reproductive glands - ANSWER seminal vesicles prostate bulbourethral glands testes are external because - ANSWER sperm needs to be 3 degrees cooler than body temp to stay alive spermatogonia - ANSWER stem cells that reside at the periphery of the seminiferous tubules, undergoing mitosis steps of ...

kidney functions - ANSWER filter plasma and excrete toxic metabolic wastes; regulate blood volume, pressure, and osmolarity via water output; regulate electrolyte and acid-base balance; secrete erythropoietin; regulate Ca2+ homeostasis and bone metabolism by participating in synthesis of calcitriol; clear hormones and drugs from blood; detoxify free radicals; and help support glucose level in conditions of extreme starvation waste - ANSWER any substance that is useless to the body or present ...

What are the essential components of an experiment? - ANSWER -Reproducible -Reliable -Control -Well designed variables What is selective permeability? - ANSWER Not all substances pass through a membrane with equal ease. What is betacyanin and where is it found? - ANSWER It is the red pigment found in the large central vacuoles of beet roots. What is a tonoplast? - ANSWER A vacuole me

Is skeletal muscle always attached to bone? - ANSWER no, example is the tongue the sliding filament theory - ANSWER -sufficient evidence to prove theory -upon stimulation, the myosin heads bind to actin and sliding begins -thin filaments slide past thick ones -Z-disc becomes shorter -heads will leave one binding site and move to the next -elastic fibers bring the thin filaments back to their original state (elasticity) -A band stays the same -sarcomere shortens -myosin section becomes...

CNS - ANSWER brain and spinal cord PNS - ANSWER Cranial nerves and spinal nerves (nerves and sensory receptors) somatic nervous system - ANSWER division of PNS skeletal muscles (muscles attached to our bones). Diaphragm is somatic because it is skeletal but it is inside the body. autonomic nervous system - ANSWER division of PNS smooth (intestines, blood vessels) and cardiac (heart muscles) muscles, glands (cells or many cells that can synthesize and secrete molecules to the body) ...

Arctic ozone dent - ANSWER Area of stratosphere over arctic region where ozone concentrations are low Climate change - ANSWER Directional change in climate over a period of 3+ decades Greenhouse effect - ANSWER Warming of the earth by gasses in atmosphere that absorb and rereadiate infrared energy emitted by earth's surface Greenhouse gasses - ANSWER Atmospheric gases that absorb and reradiate the infrared radiation emitted by earth's surface (H2O, CO2, CH4, and N2O) Aerosols - ANS...

When compared to a classic lever system, the synovial joins our musculoskeletal system play the role of the______. - ANSWER fulcrum Which of the following events will occur when depolarizing graded potentials reach the membrane of the axon hillock, causing it's membrane potential to reach threshold? - ANSWER voltage-gated Na+ channels open rapidly The attachment of a muscle's tendon to the stationary bone is called the___; the attachment of the muscle's other tendon to the moveable bone...

What are the three types of muscle tissue? - ANSWER Skeletal, Cardiac, and Smooth What are characteristics of skeletal muscle? - ANSWER Striated, voluntary, multinucleated, somatic nervous system control What are characteristics of smooth muscle? - ANSWER Non-striated, involuntary, uninucleated, autonomic nervous control What are characteristics of cardiac muscle? - ANSWER Striated, branching, uninucleated, involuntary, autonomic nervous control, intercalated discs (gap junctions) Wh...

Chemical energy derived from the fixation of carbon by photosynthesis and chemosynthesis is known as _______ production. gross secondary net primary - ANSWER primary The total amount of photosynthesis is referred to as gross photosynthetic production (GPP). net photosynthetic production (NPP). gross primary production (GPP). net primary production (NPP). - ANSWER Gross primary production (GPP) Which of the following would likely have the greatest proportion of productivity goin...

Function follows _____________ - ANSWER Form Afferent = - ANSWER Sensory Efferent = - ANSWER Motor Two divisions of the sensory nervous system: - ANSWER Somatic and visceral What does the somatic nervous system control? - ANSWER skin, skeletal muscles, joints What does the visceral nervous system control? - ANSWER smooth muscle, cardiac muscle, glands, organs two divisions of motor division - ANSWER somatic nervous system and autonomic nervous system T/F: As the stomach expa...