Responses to the Environment - AP Biology
- Identify the primary role of glucagon.
- Glucagon increases blood glucose levels by promoting the release of glucose from the liver. Raises blood sugar when energy is needed.
- Define classical conditioning.
- Classical conditioning is a learning process that pairs a neutral stimulus with a reflexive response. Associates unrelated stimuli to create conditioned responses.
- What is the function of the endocrine system?
- The endocrine system produces hormones that regulate metabolism, growth, and development. Chemical messengers coordinate long-term physiological changes.
- What is a stimulus in the context of biology?
- A stimulus is any change in an organism's environment that elicits a response. Environmental changes trigger cellular and behavioral responses.
- What is the role of the autonomic nervous system?
- The autonomic nervous system controls involuntary bodily functions like heartbeat and digestion. Operates without conscious control for basic functions.
- What is the role of the pineal gland?
- The pineal gland secretes melatonin, influencing sleep patterns and circadian rhythms. Controls daily sleep-wake timing.
- Define photoperiodism.
- Photoperiodism is the physiological reaction of organisms to the length of day or night. Day length triggers seasonal behaviors and development.
- What is the purpose of a plant's stomata?
- Stomata are pores that regulate gas exchange and water loss in plants. Control transpiration and photosynthetic gas exchange.
- What is the function of the thalamus?
- The thalamus relays sensory and motor signals to the cerebral cortex. Processes and directs sensory information to brain.
- What triggers the fight or flight response?
- The fight or flight response is triggered by the release of adrenaline and noradrenaline. Stress hormones activate sympathetic nervous system.
- Identify the role of auxins in plant response.
- Auxins are hormones that regulate plant growth and response to light and gravity. They control cell elongation and directional growth responses.
- Define osmoregulation.
- Osmoregulation is the control of water and solute concentrations in the body. Maintains proper fluid balance for cellular function.
- Define imprinting in animal behavior.
- Imprinting is a rapid learning process occurring early in life, establishing long-lasting behavioral responses. Critical period learning that forms permanent attachments.
- What is a negative feedback loop?
- A negative feedback loop counteracts changes in a system to maintain stability. Opposes deviations to restore original state.
- Describe the process of acclimatization.
- Acclimatization is the gradual physiological adjustment to environmental changes. Physiological adjustment to new environmental conditions.
- Identify the role of pheromones in animal behavior.
- Pheromones are chemicals that influence the behavior or physiology of other members of the same species. Chemical communication for mating and territory marking.
- What is operant conditioning?
- Operant conditioning is a learning process where behavior is shaped by rewards or punishments. Consequences modify future behavior patterns.
- What is learned behavior in animals?
- Learned behavior is acquired through experience and environmental interactions. Behaviors modified by experience and practice.
- Identify the role of the sympathetic nervous system.
- The sympathetic nervous system prepares the body for stress-related activities. Activates during stress to mobilize energy resources.
- Define thermoregulation.
- Thermoregulation is the process by which animals maintain their body temperature. Essential for enzyme function and cellular processes.
- Define 'taxis' in biological terms.
- Taxis is a directed movement toward or away from a stimulus. Movement has a clear direction relative to the stimulus source.
- What is the role of ethylene in plants?
- Ethylene is a plant hormone that regulates fruit ripening and response to stress. Gas hormone triggering fruit maturation processes.
- What is the function of antidiuretic hormone (ADH)?
- ADH regulates water balance by increasing water reabsorption in the kidneys. Prevents dehydration by conserving body water.
- Define the term 'kinesis' in biology.
- Kinesis is a non-directional response to a stimulus, resulting in increased activity. Movement lacks direction but changes in response intensity.
- What is the definition of a tropism?
- A tropism is a growth response toward or away from a stimulus in plants. Directional growth response to environmental stimuli.
- What is phototropism?
- Phototropism is the growth of a plant towards or away from light. Plant shoots grow toward light for optimal photosynthesis.
- Identify the role of gibberellins in plants.
- Gibberellins are plant hormones that promote stem elongation and seed germination. Stimulate growth and break seed dormancy.
- What is the role of insulin in the body?
- Insulin is a hormone that regulates blood glucose levels by facilitating cellular uptake of glucose. Lowers blood sugar by enabling glucose absorption.
- Identify the primary function of the hypothalamus.
- The hypothalamus regulates homeostasis and links the nervous system to the endocrine system. Central control center for body's internal balance.